Tiger Woods tees off on the first hole during the third round of the AT&T National golf tournament at the Aronimink Golf Club, Saturday, July 3, 2010, in Newtown Square, Pa. (AP Photo/Matt Slocum)
July 3, 2010 2:16:04 PM PDT
By DOUG FERGUSON AP Golf Writer
NEWTOWN SQUARE, Pa. (AP) - July 3, 2010 --
Tiger Woods has switched to a Nike golf ball that has a slightly harder cover and spins less than his previous model, which might explain why he has been hitting his tee shots farther than he has all year.